Tuesday 28 February 2012

Prediction of magnetic arrays

On thermalization of magnetic nano-arrays at fabrication. Cristiano Nisoli
New J. Phys. 14 035017 (2012)

Left: arrays of different lattice constants grown at the same fabrication temperature show an ordered microstate when the lattice constant is smaller than a critical value ac. In the figure we plot the blocking temperature Tb(h) and the critical temperatures Tc(h) for arrays of three different values of the lattice constant (a > ac, a < ac, a = ac (this last one in red)) as a function of the height of the nano-islands h. h* is the stopping height, after which Tb >  T and therefore freezing-in starts.Right: during the fabrication of arrays of equal lattice constant the microstate can be controlled by varying the temperature T at deposition.

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